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Full-automatic medical image registration method based on combined point matching

A medical image, fully automatic technology, applied in the field of image processing, can solve the problems of low registration accuracy and registration success rate, low anti-interference, and many manual interventions, achieving fast registration speed and strong anti-interference ability , The effect of high registration accuracy

Inactive Publication Date: 2016-06-22
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] The purpose of the present invention is to improve the above defects in the prior art, especially for the situation that the feature-based registration method has low anti-interference, many manual interventions, low registration accuracy and registration success rate, and proposes a A fully automatic medical image registration method based on combined point matching

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  • Full-automatic medical image registration method based on combined point matching
  • Full-automatic medical image registration method based on combined point matching
  • Full-automatic medical image registration method based on combined point matching

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[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] like figure 1 As shown, the method includes the following steps:

[0030] Step 1: extract the outer contour of the medical image, and further extract the contour feature points;

[0031] The outer contour is part of the edge of the image, and the edge of the image needs to be extracted first. Here, the canny edge detection operator is selected to detect the edges of the reference image and the floating image. It should be pointed out that the edge extraction method here does not necessarily use the canny edge detection operator, and other methods that can produce good edge extraction resu...

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Abstract

The present invention discloses a full-automatic medical image registration method based on combined point matching. The method comprises the realization steps of (1) extracting a medical image outer contour, and further extracting the contour characteristic points; (2) extracting the specific area angular points as the characteristic points; (3) combining the two types of characteristic points to obtain a reference image characteristic point set and a floating image characteristic point set respectively; (4) establishing a point set similarity evaluation mechanism based on an improved hausdorff distance; (5) carrying out the point set full-automatic registration according to the evaluation mechanism until an ending condition is satisfied, and outputting a registration result. The method of the present invention realizes the full-automatic medical image registration without the limited areas, and enables the image registration speed to be accelerated greatly while guaranteeing the result precision.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a fully automatic medical image registration method based on combined point matching. Background technique [0002] Image registration technology has broad application prospects in the field of clinical medicine. The basic idea is: set a specific image as a reference image, set one or more images to be registered as a floating image, establish the spatial correspondence between the floating image and the reference image and the appropriate Similarity evaluation mechanism. According to the size of the similarity between the floating image and the reference image, the spatial transformation parameters from the floating image to the reference image are continuously adjusted, and finally the transformation parameters under the best registration result are obtained to prepare for the next step of image fusion. [0003] Image registration methods are mainly divided into two types: reg...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T2207/30004
Inventor 王保云谢九成胡海东高浩
Owner NANJING UNIV OF POSTS & TELECOMM
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